Error spotting (exam direction): Identify the erroneous part — choose D if there is no error — 'He is not to blame / for what has happened / for he is in no way connected with it. / No error.'

Given sentence parts (A–D)
A. He is not to blameB. for what has happenedC. for he is in no way connected with it.D. No error.

Concept/Approach (idiomatic expression and conjunction 'for')
The idiom 'to be to blame (for …)' is standard: 'He is not to blame for …' The second 'for' introduces a reason (meaning 'because'), which is also correct in formal style. Hence, no grammatical error is present.

Verification
Alternative phrasing: 'He is not to blame for what has happened, because he is in no way connected with it.' Both versions are acceptable.

Common pitfalls
Assuming 'to be blamed' is required; both 'to blame' (adjectival complement) and 'to be blamed' (passive) occur, but 'to blame' is idiomatic and concise.

Final Answer
D — No error.